Compression-box for oil-presses



M. B. GREEN.

COMPRESSION BOX FOR GIL PRESSES.

APPLKICATLON FILED OCT. 17, I9l9.

Green,

INVENT DR WITNESSES l l .l

l I AT1-o R N EY/S' M. B. GREEN.

COMPRESSION BOX FOR OIL PRESSES. APPLICATION'HLED ocT. 17. |919.

Patented July 2o, 1920, 2 SHEETS-suur 2.

73 lllllb iii 9 Wiki-@V i UNITED STATES MICHAEL B. GREEN, 0F MEMPHIS,TENNESSEE.

COMPRESSION-BOX IOR OIL-PRESSES.

VApplication filed October 17, 1919.

To all whom t may concern.'

Be it known that I, MICHAEL B. GREEN, a citizen of the United States,residing at Memphis, in the county of Shelby and State of Tennessee,have invented certain new and useful Improvements in Compression-Boxesfor Oil-Presses, of which the following is a specification.

This invention has reference to compression boxes for use in connectionwiththe pressing of oil from cotton seed and other oil producingcommodities, and its object is to provide a substitute for the oldertype of perforated plates, whereby a greatly increased output of oilAwith respect to quann tity and speed isV obtained, great strength ofconstruction is obtained, and there is increased durability wherebythere is a marked saving in renewals.

In accordance with the invention, provision is made for the ready escapeof the oil forced out by pressure, the arrangement being such that whilethe aggregate area of the escape passages is large, such passages are ofindividually small size so that the press cloth inclosing the seed mealor other material to be treated, isnot distorted or torn and isconsequently of long life, this being a particularly valuable featuresince the cost of press c loth has, in late years, been steadilyincreasing. Y

VThe extraction of the oil is accomplished in presses each made up of acolumn of compression boxes interposed with press cloth,

customarily of horsehair, lodged between the boxes and inclosing themeal, and thewhole press is then subjected to sufficiently high pressureto cause the oil to flow out from the meal and find ready .escapethrough the boxes, which will, though provided with numerous passages,have such passages so disposed that the strength of the'boxes willresistv the heavy pressure, and the meal is retained without materialrestriction to the free flow of the oil.

The invention lies in the formation and relation of the escape passageswhich are of relatively minute area where engaging the press clothcontaining the seed, but are so disposed that the compression box isnowhere sufficiently weakened to permit warping or distortion. f

The invention will be best understood from a consideration of thefollowingY detailed description, taken in connection with theaccompanying drawing forming part of Specification of Letters Patent.

Patented July 20, 1920.

Serial No. 331,342.

this specification, with the understanding, however, that the inventionis not confined to any strict conformity with the showing in thedrawings but may be changed or modified so long as such changes andmodification mark no material departure from the salient features of theinvention as expressed in the appended claims.

In the drawings,

Figure l is an elevation of a press embodying the invention; Y Fig. 2 isa plan viewk of a portion of one of the compression boxes;

Fig. 3 is an edge view of the structure in Fig. 2 as seen from the lefthand end;

Fig. 4 is a side view of one of the intermediate bars showing theconnecting rods or rivets in cross section;

, Fig. 5 is a section of the line 5-5 of Fig. 2;

Fig. 6 is a section on the line 6 6 of Fi 4;

4igs. 7, 8, 9 and l0 show a series of cross sections of the barsillustrating progressive steps in the formation of the bars.

Referring to the drawings, and especially to Fig. l, there is shown aknown form of press including a head or crown l, a base 2, guidingpillars or posts 8, a series of plates 4, each with guiding angle bars5, and compression boxes 6 to be supported on the plates 4 and guided bythe angles 5. The material to betreated is as is customary, inclosed insuitable press cloth, and lodged on the boxes 6 for compression betweenthese boxes and plates 4. This is the usual procedure and requires nospecial description. The oilforced from the seed meal, or othercommodity being treated, overflows the compression boxes and may becaught in a pan 8 and conducted to a suitable point of disposal.

The compression box 6 is, because of manufacturing reasons, formed of aseries of longitudinal bars 6, shown as of rectangular cross sectionwith longitudinal recesses or grooves 9 on opposite sides, except thatbars 6a forming the long side bars of the box have grooves 9a closed atthe ends, as shown in Fig. 3, instead of being as long as the bars, asshown in Fig. 4, this preventing the marginal bars of the Vcompressionbox from overflowing at the extremities.

The grooves 9 are, or may be, of semi-circular cross section so thatwhen the bars are brought together' in face to face relation, thecompression box is provided with a longitudinal series of substantiallycircular passages extending throughout the length of the box. The upperedges ofthe grooves 9 are slightly rounded as shown at 10, thus formingan inset portionV of the'groove or passage approaching the top of thebox.

The 'barsfGa are l-held `in lface to face rela` tion by rivets or rods11 which may be headed or otherwise shaped at the ends to clamp theYseries of ybars into a substantially continuous pla-te. Under :the highcompression used there isV some passage of `oil from the surface .of theplate through the joints between `the bars to the passages 9 and this isfacilitated by the rounded edgeslO, reducing the jointsadjacent to thetop surfaceof the plate or compression box.

Cut into the grooves 9 from -tlie top surface ofeachbar 6 and diagonally:traversing the overhang of ythe corresponding groove 9,"is a slit 12,entering into ythe body of the bar toward the opposite side'thereof atthe surface to a greater extent lthan Where entering the' groove 9.

,enlargingY the discharge end ofthe slit andtherefore giving Agreaterfreedom of lescape of Vthe oil. Furthermore, the meetingedges of thebars intermediate of fthe slits 12 have preferably Vmatching andYrelatively minute notches 14 therein, adding still more to the`Aarea'of escape of the expressed oil without vnoticeable diminutionofthe strengthV of the bars.

l Thematerial, `when .prepared for the eX- pressing vof theoil orotherliquid` contents,

is .reduced to acondition of meal, andsuch mealfhas heretofore `giventrouble by finding its Wayinto :and clogging the drainage ypassages,^andthe fibers vof the vpress cloth in Which y'the meal -is'conined alsolhave `found their Way into ythe drainage passages, clogf ging them andcausing the rapidavear of the fabric. By the invention vtheseobjectionable features are overcome, since lthe sages necessarily meanrestricted drainagev area, but, by rthe'disposition of the passagesdrainage passages may be lmade finer than has heretofore been the case.Finer pasand their greatly increased number, the effective combined area1of the passages is `made larger vthan the combined Vareal of drainagepassages as heretofore constructed. The resistance ofthe `fineV'passages t'olthe This iny flow of the oil or othernliquid is reducedby the undercut recesses 13 and the lateral elongation -of lthe slits12, such elongation beinggreaterthan the lateral depth of the Agrooves'9'. The'notches 14 also add to the area of drainagef The arrangementofthe recesses, slits and notches is such thatarn'ple integralmaterialoffthe'bars remains in positionY to impart the necessaryresistance of the bars to the high pressure to Whichaineal, from whichthe oil fis expressedyis subject.

"The passages vforvthe escape of .the ei;- pressed material,progressively increase' in size from lthetop surface ofthe bars to thegrooves 9 so -thatdespitethe minute size of each individual slit,resistance of such slit to the flow of the expressed material-is.greatly reduced and freedom Tof flow is obtained Without liabilityofvvclogging orV of injuring the :press cloth inwhich the .meal isconfined.-Vv V Y.

The invention provides-'an increasedipercentage of oil .per ton of seedtreated, causes a prolongation Vin the life of the ,press cloth, andamore freevdischarge-.of oil from the cake :intoY the main reservoirheretofore been rthe-case.l

Vhat is claimedis.; Y 1. A bar .for :the construction V'of ,compressionboXes yforoillpresses, having grooves in than has the side Afaces toform-escapepassages, with .the top :of the bar Aoverhanging .fthegrooves,

and said overhanging portions `having `lateral. slits Aextending yfrom:the ftop 4surface -of the -bafr into the groves, Withfthe 'inner endsof the slits slantin'g toward the opposite side of the bar and the slitsstaggered on 'oppo-l Y site rsides ofthe vbar,1|each. slitbeingunderridden by a recess entering-the body :of t-he bar back of thegroove and expanding into said grove. 7

2. A lbar for the construction.- of :compression boxes 'for oilipresses, lhaving grooves in the side faces 4'to form escape passages,Y*

with :the top of 'the baroverhanging the grooves,Yand-saidoverhangingportions vhaving lateral slits ertendingfromthe topsurface -of the bar into the grooves, Witlithe Vinner endso'f the slitscarried toivard the op- Y lpositeiside ofthebar andthe slitsV staggeredon oppositelsidesfof the bar, each slit jbeing underriddenfby a recessentering the body yof the. .rbarj backy of thegroove andV expanding.into'the said groove, the Youterends ofthe foverhangs. having=relatively Vminute Vup and down lnotches intermediate' of therenteringvends ofthe slits. Y Y L .3. A'bar-for the eonstructionof compressionboxes for :oi-l:presses,'.1having longitudinal :grooves f in the. sideVfaces'to form escape passages With thetop lofthegbaroverliangingthe-longitudinal groves, said overyhanging` portions having:laterally lextended recesses entering the barV in `intersectingrelation tothe :longitudinal grooves Vandsaid overhanging pcrtionshaving slits extending from the top surface of the bar to thelongitudinal grooves through the overhangs with each slit intermediateof a recess and the slits extending to the rear walls of thelongitudinal grooves.

t. A bar for the construction of compression boxes for oil presses,having longitudinal grooves in opposite side faces to form escapepassages for the oii, with the top o1" the bar overhanging the grooves,said overhanging portions having entering slits extending laterally intothe bar and int-o the grooves in intersecting relation thereto to agreater depth than the portions of the grooves intersected by the slits,and said overhanging portions also having recesses formed therein toenlarge the slits where entering the grooves to the full depth of therecesses, with each recess extending on opposite sides of the respectiveslit.

5. A bar constituting a longitudinal side bar in the construction ofcompression boxes for oil presses, having grooves in the side faces toform escape passages with the grooved part-of the outer face of the barclosed at the ends and the groove on the inner tace of the bar open atthe ends and with the top or the bar overhanging the grooves, saidoverhanging portions having lateral slits extending from the top surfaceof the bar into the grooves with each groove entered by a pluralit7 ofsaid slits, and lateral recesses formed in the under surfaces of theoverhangs with each recess extending on opposite sides of acorresponding slit in communication therewith throughout the length ofthe recess, whereby to provide enlarged drainage area between a slit andthe groove into which it empties.

In testimony whereof I alix my signature.

MICHAEL B. GREEN.

